Rainbow colors in the wrong direction.

Rainbow colors in the wrong direction.
The setting sun is behind the tree and in the middle of the photo are rainbow colors. They are in the wrong place, does anyone know about the cause of this? I saw them from the bus on the way home and took me a while to get to a clear position and adjust the phone to pro setting. The color must have lasted for more than 15 minutes and I think the colors moved relative to the clouds as well.

Oppo Phone

None